New Low Bandgap Conjugated Polymer Derived from 2, 7-Carbazole and 5, 6-Bis(octyloxy)-4, 7-di(thiophen-2-yl) Benzothiadiazole: Synthesis and Photovoltaic Properties
New Low Bandgap Conjugated Polymer Derived from 2, 7-Carbazole and 5, 6-Bis(octyloxy)-4, 7-di(thiophen-2-yl) Benzothiadiazole: Synthesis and Photovoltaic Properties
复制标题
DOI：
10.1002/app.34439
复制
发表时间：
2012-01
影响因子：
3
通讯作者：
P. Ding;Cheng-Che Chu;Y. Zou;Dequan Xiao;Chun-yue Pan;Chain‐Shu Hsu
中科院分区：
文献类型：
--
作者：
P. Ding;Cheng-Che Chu;Y. Zou;Dequan Xiao;Chun-yue Pan;Chain‐Shu Hsu
为了开发具有低能带隙、深HOMO能级和良好溶解性的共轭聚合物，通过Suzuki交叉偶联聚合反应，合成了一种基于N-9′-十七烷基-2，7-咔唑和5，6-双辛氧基-4，7-二（噻吩-2-基）苯并噻二唑的新型共轭交替共聚物PC-DODTBT。该聚合物显示出优异的溶解性和热稳定性，分解温度（5%重量损失）为327°C。PC-DODTBT的HOMO能级为-5.11eV，表明聚合物具有相对深的HOMO能级。由SCLC方法推导出的PC-DODTBT的空穴迁移率被发现为2.03 × 10−4 cm 2/。制备了基于重量比为1：2.5的PC-DODTBT和[6，6]-苯基-C71-丁酸甲酯（PC 71 BM）的共混物的聚合物太阳能电池（PSC）。在AM 1.5（AM，空气质量）、100 mW/cm−2照明下，发现器件表现出0.73 V的开路电压（Voc）、5.63 mA/cm−2的短路电流密度（Jsc）和1.44%的功率转换效率（PCE）。这种光伏性能表明，该共聚物是有前途的聚合物太阳能电池的应用。© 2011 Wiley Periodicals，Inc.应用聚合物科学杂志，2011年
To develop conjugated polymers with low bandgap, deep HOMO level, and good solubility, a new conjugated alternating copolymer PC-DODTBT based on N-9′-heptadecanyl-2,7-carbazole and 5, 6-bis(octyloxy)-4,7-di(thiophen-2-yl)benzothiadiazole was synthesized by Suzuki cross-coupling polymerization reaction. The polymer reveals excellent solubility and thermal stability with the decomposition temperature (5% weight loss) of 327°C. The HOMO level of PC-DODTBT is -5.11 eV, indicating that the polymer has relatively deep HOMO level. The hole mobility of PC-DODTBT as deduced from SCLC method was found to be 2.03 × 10−4 cm2/Versus Polymer solar cells (PSCs) based on the blends of PC-DODTBT and [6,6]-phenyl-C71-butyric acid methyl ester (PC71BM) with a weight ratio of 1:2.5 were fabricated. Under AM 1.5 (AM, air mass), 100 mW/cm−2 illumination, the devices were found to exhibit an open-circuit voltage (Voc) of 0.73 V, short-circuit current density (Jsc) of 5.63 mA/cm−2, and a power conversion efficiency (PCE) of 1.44%. This photovoltaic performance indicates that the copolymer is promising for polymer solar cells applications. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011